Clamp for concrete-forms.



D. T. HARRIES & G. JONES.

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1,064,727. Patented June 17, 1913. Q

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DAVID T. HABRIES AND GRIFFITH JONES, OF CHICAGO, ILLINOIS.

CLAIM? FOR CONCRETE-FORMS Specification o f Letters Patent. Application filed July 10, 1911. Serial No. 637,598.

Patented June 17, 1913.

To all whom it may concern:

Be it known that we, DAVID T. HARRIES and Gnirrrrn Jonas, citizens of the United States, residing at Chicago, in the county of 5 Cook and State of Illinois, have invented certain new and useful Improvements in Clamps for Concrete-Forms, of which the following is, a specification.

The object of our invention is to provide for holding the, parts of concrete forms together while the material is hardening or setting. Our device may also be applied to forms for holding other plastic materials.

The principal object of our invention is to provide a device of the character mentioned which will hold the parts of column forms in place while the material is setting.

Our device comprises a flexible band which he quickly placed about the form and which is provided with a lever for drawing it tightly in place. It is also provided with means for locklng it in the position described.

Other objects and advantages of our invention will be apparent from the following description when taken in connection with the accompanying drawings, in which Figure 1 is a perspective view of a portion of an upright square form for a vertical column, with our clamping device shown as applied thereto. Fig. 2 is a plan .view, partlyin section, of the clamping lever and band. Fig. 3 is an elevation thereof; and Fig. 4 is a cross section of the clamping lever and band, taken along the line 4-4 of 2. v

Referring to Fig. 1, the band 10 is preferfleXible strip of metal of such thickness and width as will permit it to be quickly bent around the form. The clamping lever 11 is pivotally attached to one end of this band and is adapted to en- 4 gage variable portions of the other end of the band. When the band is thus engaged by the lever it may be drawn tightly into lace.

' 'The form comprises inner rectangular 50 boards or planks 12, which preferably overlap at the edges, as shown at 12, 12", &c. The plastic material is inclosed within-these planks. Immediately exterior to said forms are cleats 13. These but preferably "do not overlap.

any suitable manner, as lever 11 is also provided with a bar 17 spaced from the bar 14 and preferably inagainst the body cleats meet at the ex The lever.11 is provided with a pin or bar 14 .at one end, which is preferably integral with the body of the lever. pivotally attached to the said pin or bar by means of a loop 15, which is made by bending the'end portion of the band-upon itself and securing it to the body of saidband in shown at 16. The

tegral with the body of the lever. Aspace 19 between the bar 17 and the adjacent portion 20 of the lever permits the insertion of the'opposite end portions of the band. The

The band 10 is bar 17 is provided with angular edges, as

shown at 21', and the adjacent portion of the bar is provided with a similar angular edge at 22. When the end portion of the-band is inserted in the space or aperture 19 and a tension is produced'in said band, the angular edges 21 and 22 will cause abrupt angles or bends to be formed in said band. These abrupt angles or bends hold the band in place and prevent its slipping out when tension is applied to the device. It is then held more perfectly end portion 23 of the band is held closely of the lever by the user of the device.

In order that the lever 11 may he retained in its closed or operative position, a short chain 24 is provided. This chain 15 secured at one end to the band by means of a small strip of metal or other device 25. At the other end a pin 26 is attached to the chain and may be inserted in an aperture 27 in the body of the lever. By this means the lever may be efi'ectivel held in close relation to the side of the orm, therebylocking and clamping the device in position.

In order that a greater leverage may be applied to the device than is permitted by the shortlength of the lever, a piece of gas ipe 28 may be placed over the end of the ever. Said gas pipe is shown in dotted lines in Fig. 3.

by the said angles whenthe therefore a aperture 19. Such length of the end portion is inserted in the aperture as will permit the lever to draw up the entire band with'the desired'tightness. The user may grasp the end 23 of the band simultaneously with the lever 11. When the lever is pressed against the band and against the side of the form, it becomes self-locking. The small chain 24 and pin 26 serve to revent the device from becoming loosene The boards or cleats 13 are rounded at 29 to prevent sharp bends in the band.

It will be apparent from the foregoing description of our improved clamping device that it may be used onany shape or size of form, thereby avoiding the necessity of proarate clamps for each size and shape. 13/ any columns are circular and other forms .very frequently occur. Our clamp is applicable to any of these,' and single clamp may have a very extended use. 7

While we have described our invention with more or less minuteness and as being: i

embodied in certain' precise forms, yet. it will be understood that we do not desire'to limit ourselves thereto unduly,,or any more lever to one end of slipping relatively as circumstances may suggest or necessity render expedlent.

We cla1m: In a clamp for concrete forms, the combination with a flexible metallic band, of a which said band is pivotally attached, said lever having an opening than is pointed out in the claims: On the through which said bandta'djustably passes, I

the walls on opposite sides of said opening being formed with angular edges around which the band asses and by which the band is bent and thereby prevented from to said lever when the latter is oscillate to draw the portions of said band which it engages past each-other.

In testimony whereof, we have subscribed our names.

' DAVID 'r. YHARRIES.

GRIFFITH JONES.

Witnesses:

HENRY A. PARKs, ANNIE O. Coumrmmr.- 

